namespaces

[Tony Johansson]

Hello!

I'm reading a book about C++ and there is something that I don't understand
so I ask you.

It says
"A namespace can contain only the declaration of a member. The corresponding
definitions may be provided outside the namespace; Isn't this wrongit says A
namespace can contain only the declaration of a member. I have definitions
of classes in the namespace even with methods defined and it works.

For example:"

namespace Company
{ class Employee; //class declaration }

class Company::Employee
{
.....
};

//Tony

 

[Pete Becker]

It says
"A namespace can contain only the declaration of a member. The corresponding
definitions may be provided outside the namespace; Isn't this wrongit says A
namespace can contain only the declaration of a member.

It's sloppy writing. Put the emphasis on the second sentence: you can
put definitions outside the namespace if you want to.

 

[Kanenas]

It's sloppy writing. Put the emphasis on the second sentence: you can
put definitions outside the namespace if you want to.

It's also possibly misleading. A definition is a declaration; unless
the author has noted this before and close to the quoted statement,
the sentence is true but will be misread (as the OP has demonstrated).

Kanenas

 

[Victor Bazarov]

I'm reading a book about C++ and there is something that I don't understand
so I ask you.

It says
"A namespace can contain only the declaration of a member. The corresponding
definitions may be provided outside the namespace; Isn't this wrongit says A
namespace can contain only the declaration of a member. I have definitions
of classes in the namespace even with methods defined and it works.

For example:"

namespace Company
{ class Employee; //class declaration }

class Company::Employee
{
....
};

The class 'Employee' is a _member_ of the namespace 'Company'. So, I am
not sure what your complaint is about.

V